ev::Mat::Binary_< Tb > Class Template Reference

Spatial map marking whether any event has occurred at each pixel. More...

#include <matrices.hpp>

Inheritance diagram for ev::Mat::Binary_< Tb >:

Public Member Functions
template<typename T>
Tb	insert (const Event_< T > &e)
	Insert an event, setting the pixel at (e.x, e.y) to ON.
template<typename T>
Tb	emplace (const T x, const T y)
	Set the pixel at (x, y) to ON without constructing an Event_.
Public Member Functions inherited from ev::Mat::Mat_< Tb >
void	updateStats (const Event &e)
	Account for an event in the statistics reported by count() and duration().
std::size_t	count () const
	Number of events accounted for by updateStats().
TimeType	firstTimestamp () const
	Timestamp of the first event accounted for by updateStats().
TimeType	lastTimestamp () const
	Timestamp of the last event accounted for by updateStats().
void	resetStats ()
	Reset statistics.
void	clear ()
	Reset all pixels.
Public Member Functions inherited from ev::Stats_< Mat_< Tb > >
ResultType	duration () const
	Time difference between the last and the first event.
ResultType	rate () const
	Compute event rate as the ratio between the number of events and the time difference between the last and the first event.
ResultType	density (const cv::Size size) const
	Compute event density as the ratio between the number of events and the number of pixels.
std::size_t	activePixels () const
	Count the pixels with at least one event.
ResultType	fillRatio (const cv::Size size) const
	Compute fill ratio as the fraction of pixels with at least one event.
ResultType	polarityRatio (const PolarityType p) const
	Compute polarity ratio as the fraction of events with the given polarity.
Event_< ResultType >	mean () const
	Compute the mean of the events.
cv::Point_< ResultType >	meanPoint () const
	Compute the mean x,y point of the events.
cv::Matx< ResultType, 2, 2 >	covariance () const
	Compute the covariance of the x,y coordinates of the events around meanPoint().
cv::Rect	boundingBox () const
	Compute the smallest rectangle of pixels containing the events.
ResultType	meanTime () const
	Compute the mean time of the events.
ResultType	midTime () const
	Calculate the midpoint time between the oldest and the newest event.
std::size_t	peak () const
	Find the largest number of events on a single pixel.
ResultType	entropy () const
	Compute the Shannon entropy of the spatial distribution of the events.

Static Public Attributes
static constexpr Tb	ON = std::numeric_limits<Tb>::max()
static constexpr Tb	OFF = static_cast<Tb>(0)

Friends
std::ostream &	operator<< (std::ostream &os, const Binary_ &binary)

Additional Inherited Members
Public Types inherited from ev::Stats_< Mat_< Tb > >
using	ResultType

Detailed Description

template<typename Tb>
class ev::Mat::Binary_< Tb >

Spatial map marking whether any event has occurred at each pixel.

Each pixel is set to ON upon insertion regardless of polarity, and reset to OFF by clear().

The following alias is defined for convenience:

using Binary = Binary_<uchar>;

Member Function Documentation

emplace()

template<typename Tb>

template<typename T>

Tb ev::Mat::Binary_< Tb >::emplace ( const T x, const T y )

inline

Set the pixel at (x, y) to ON without constructing an Event_.

Parameters

x	Spatial coordinate x
y	Spatial coordinate y

Returns

New pixel value (ON)

insert()

template<typename Tb>

template<typename T>

Tb ev::Mat::Binary_< Tb >::insert ( const Event_< T > & e )

inline

Insert an event, setting the pixel at (e.x, e.y) to ON.

Parameters

e	Event to insert

Returns

New pixel value (ON)

Member Data Documentation

OFF

template<typename Tb>

Tb ev::Mat::Binary_< Tb >::OFF = static_cast<Tb>(0)

staticconstexpr

Value after clear()

ON

template<typename Tb>

Tb ev::Mat::Binary_< Tb >::ON = std::numeric_limits<Tb>::max()

staticconstexpr

Value written on event insertion

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The documentation for this class was generated from the following file:

• modules/core/include/openev/core/matrices.hpp